Ferromagnetic phase in the polarized two-species bosonic Hubbard Model
arXiv:1405.4849 · doi:10.1103/PhysRevB.90.205104
Abstract
We recently studied a doped two-dimensional bosonic Hubbard model with two hard-core species, with different masses, using quantum Monte Carlo simulations [Phys. Rev. B 88, 161101(R) (2013)]. Upon doping away from half-filling, we find several distinct phases, including a phase-separated ferromagnet with Mott behavior for the heavy species and both Mott insulating and superfluid behaviors for the light species. Introducing polarization, an imbalance in the population between species, we find a fully phase-separated ferromagnet. This phase exists for a broad range of temperatures and polarizations. By using finite size scaling of the susceptibility, we find a critical exponent which is consistent with the two-dimensional Ising universality class. Significantly, since the global entropy of this phase is higher than that of the ferromagnetic phase with single species, its experimental observation in cold atoms may be feasible.
arXiv comment7 pages, 7 figures
References in corpus (38)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Cold bosonic atoms in optical lattices
- Colossal Magnetoresistant Materials: The Key Role of Phase Separation
- Complexity in Strongly Correlated Electronic Systems
- Production of cold molecules via magnetically tunable Feshbach resonances
- A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
- Quantum criticality
- Heavy Fermions and Quantum Phase Transitions
- Fermi-Hubbard physics with atoms in an optical lattice
- Phase Separation in Electronic Models for Manganites
- High-temperature superfluidity of fermionic atoms in optical lattices
- Double species condensate with tunable interspecies interactions
- Phase diagram of two-component bosons on an optical lattice
- Realization of SU(2)*SU(6) Fermi System
- Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
- Degenerate Bose-Bose mixture in a three-dimensional optical lattice
- Phase separation in supersolids
- 39-K Bose-Einstein condensate with tunable interactions
- Interaction-induced adiabatic cooling and antiferromagnetism of cold fermions in optical lattices
- Supersolid phase of hardcore bosons on triangular lattice
- Mixtures of Bosonic and Fermionic Atoms in Optical Lattices
- Interaction-driven Dynamics of 40K / 87Rb Fermi-Bose Gas Mixtures in the Large Particle Number Limit
- Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
- Sign-Alternating Interaction Mediated by Strongly-Correlated Lattice Bosons
- Squeezing Out the Entropy of Fermions in Optical Lattices
- Thermodynamic glass transition in a spin glass without time-reversal symmetry
- The Stochastic Green Function (SGF) algorithm
- Directed update for the Stochastic Green Function algorithm
- Critical entropies for magnetic ordering in bosonic mixtures on a lattice
- 3D Projection Sideband Cooling
- Ground state cooling of atoms in optical lattices
- Magnetic phases and transitions of the two-species Bose-Hubbard model
- Advantages of Mass-Imbalanced Ultracold Fermionic Mixtures for Approaching Quantum Magnetism in Optical Lattices
- The superfluid density in continuous and discrete spaces: Avoiding misconceptions
- Two-species hard-core bosons on the triangular lattice: A quantum Monte Carlo study
- Competing supersolids of Bose-Bose mixtures in a triangular lattice
- Effective field theory for two-species bosons in an optical lattice: Multiple order, the Nambu-Goldstone bosons, the Higgs mode and vortex lattice
- Complex phases in the doped two-species bosonic Hubbard Model